It's been a long time since the DJIA tracked just America's smokestack economy. But today's economic rebound is being led so far by traditional manufacturers. And if you plot those Dow components as a group, you'll see they're leading the larger pack by far.

The Dow tumbled Tuesday 178 points, or 1.6%, to close at 11,024 as part of a global sell-off in stocks fueled by further speculation that China will hike interest rates to fight inflation and renewed worries over the wobbly finances of Ireland, Portugal and Greece.

The first peak week of second-quarter earnings season was just what the market ordered, thanks to some beat-and-raise reports from Dow blue chips. This week has more such big-name results on tap. And again, investors will be looking closely for top-line revenue growth.

Technology company 3M said that second-quarter sales may have risen between 4 and 6 percent from a year earlier to $6.6 billion to $6.75 billion, driven by a sharp rise in organic sales volumes.
3M CEO George Buckley will make the forecast to a meeting of investors and analysts meeting in Kentucky today, the company said in a statement.